{
  "manageEntity": {
    "action": "Save",
    "entityId": "99826058",
    "entityType": "Track",
    "nonce": "1787598157704672810",
    "signature": "0x779b35aac531aee0b54799875b81cd40bc557a7c155404dd781183710af2c88668294a56b8e7fb2a7773df71b5d6c79be93e6809f2c40bb6286bad929889cc071b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}